The Fluke 80PK-24 sheath material is 300 Stainless Steel. The 38-inch (1 meter) cable is terminated with a Type K miniature thermocouple connector with 0.792-mm (.312-in) pin spacing.
The 80PK-24 can be used with any temperature-measuring instrument that is designed to accept Type K thermocouples and has a miniature connector input.
Type K Standard Grade Ni-Cr vs Ni-Al (Chromel vs Alumel)
Measurement Range :-40 °C to 816 °C (-40 °F to 1500 °F)
The baffle tip of the 80PK-24 has a continuous temperature rating of 816 °C (1500 °F). However, the
opposite end of the sheath nearest the handle should not be subjected to temperatures greater than 125 °C (257 °F). This is the maximum temperature limitation of the handle.
The stainless steel baffle and sheath should not be exposed to halides or sulfides. Even though the sheath to junction transition is sealed, it is not recommended to immerse the probe in liquid or saturated vapor. The 80PK24 should not be used in reducing atmospheres or in a vacuum.